Even small increases can have devastating consequences, according to climateexperts. If the worst climate-change predictions come true, coastal cities in the US will be devastated by flooding and greater exposure to storm surges by the year 2100.

Research group Climate Central has created a plug-in for Google Earth that illustrates how catastrophic an "extreme" sea-level rise scenario would be if the flooding happened today, based on projections in a 2017 report from the National Oceanic and Atmospheric Agency.

You can install the plug-in (directions here) and see what might become of major US cities.